52gr. A-max problems

I have a 220 swift AI and have shot 55gr v-max with satisfactory results. I decided to try the 52 a-max. I went out the first day and loaded them with the same load I use with the 55's (45gr. RL15 @ 4250fps)

They shot bad, and I don't mean 1.5" groups compared to .5". I mean an 8" group. Now I was thinking something had to be wrong, like my scope is loose or something. I went home and inspected all parts of the rifle. Eveything checked out fine.

Day two. Thought that maybe it was a fluke so I loaded some more this time just a tad hotter, they were around 4330fps. Shot my group, same result. [img]images/icons/mad.gif[/img] I was prepared this time and brought some of the ole trusties along, shot them into a nice little hole.

So what do you think is happening with these bullets? [img]images/icons/confused.gif[/img]

I had a similar situation with 55Gr Balistic Tips shooting fine but Sierra's Keyholing Like yours are doing or gonna do shortly. Sierra said switch to a different part# from thier line and they will shoot just fine in the 14 twist but that bullet, that was shorter than the BT in length (both plastic tipped bullets) but it stabilized differently and would not fly out of my gun. My brothers 223 shoots em just fine.

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If you have something that you disassemble and reassemble enough times, sooner or later, you'll have two!

MTBA, Just got my A-MAXs, I noticed they say on the box 1in14 twist, should work good in my VS 223. ALL, anyone tell me if H335 and Benchmark will work about the best for the 223 with these bullets? Put, lets say .005"-010" off the lands. Need some input from the pros out there, never shot the rifle yet, range opens up the 26th. Jay